Application of hydrological indices for erosion hazard mapping using Spatial Analyst tool

Ahmad, Imran; Dar, Mithas Ahmad; Halefom, Afera; Gebre, Tesfa; Gadissa, Ebissa; Tolosa, Asirat Teshome

doi:10.1007/s10661-019-7614-x

Cited by 19 publications

(20 citation statements)

References 10 publications

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“…SPI helps in demarcating areas having potential to be saturated with water depending upon its contributing neighbourhood and the local slope gradient [28] .…”

Section: Stream Power Index (Spi)mentioning

confidence: 99%

“…The SPI determines the erosive power of the channel and expresses the topographic potential for deposition (for low or negative values) and erosive areas (positive values). The SPI for the study area was calculated using the following command line in the Raster Calculator [28] . Fig.…”

Section: Stream Power Index (Spi)mentioning

confidence: 99%

“…STI provides information on sediment transport capacity and accumulation and their spatial distribution [28] . There are various types of relationships found to measure STI, but the model proposed by Moore and Wilson (1992) [29] is the best suited to integrate into GIS platform [30] .…”

Section: Sediment Transportation Index (Sti)mentioning

confidence: 99%

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Modelling hydrological factors from DEM using GIS

Chowdhury

2023

MethodsX

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“…SPI helps in demarcating areas having potential to be saturated with water depending upon its contributing neighbourhood and the local slope gradient [28] .…”

Section: Stream Power Index (Spi)mentioning

confidence: 99%

Section: Stream Power Index (Spi)mentioning

confidence: 99%

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Modelling hydrological factors from DEM using GIS

Chowdhury

2023

MethodsX

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“…A Topographic Wetness Index or Compound Topography Index is a way to determine how a region's hydrological system is developing (Ahmad et al 2019). It is very useful in delineating and identifying areas which can be saturated with water influenced by contributing factors like local slope gradient, etc.…”

Section: Topographic Wetness Index or Compound Topography Indexmentioning

confidence: 99%

“…In every scale from local to global, water, floods, and runoff contribute significantly to erosion and land degradation processes (Eswaran et al2001;Ahmad et al 2019). Erosion plays an important role in generating sediments and depleting soil cover over the land surface.…”

Section: Introductionmentioning

confidence: 99%

Mapping of Erosion Hazard in and around Kharagpur Hills, Bihar using hydrological indices

SHARMA

Pandey

2022

Proceedings of MOL2NET'22, Conference on Molecular, Biomedical &Amp; Computational Sciences and Engineering, 8th Ed. - MOL2NET:

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Soil is the most important gift of nature formed in hundreds/thousands of years covering the land surface but soil cover is depleting day by day due to geological and/or anthropological activities. Erosion is one of the most important geological processes in reducing the soil cover.Hence, there is a requirement to conserve the soil cover and the first thing which can be done in order to conserve the soil is the identification of vulnerable areas. Identification of vulnerable areas is of foremost importance which could be done by scientific methods. Hydrological Parameters are one of them which can be calculated using Geographic Information System. In this study, Digital Elevation Models have been processed in geographic Information System to calculate three important hydrological indices i.e., Sediment Transport Index, Topographic Wetness Index and Stream Power Index along with other parameters like Slope. Maps showing variability in Slope, Sediment Transport Index, Topographic Wetness Index and Stream Power Index have been prepared to understand the variability and the importance of each parameter in marking the vulnerable areas to erosion. With this, an Erosion Hazard Vulnerability Map of the study area (in and Around Kharagpur Hills, Munger-Jamui, Bihar) has been prepared using Weighted method of Geographic Information System. It has been found that Soil cover over the hills with Steep Slopes are more prone to erosion whereas Soil cover over the very gentle slopes or in the flat areas are least prone to erosion. Along with this it has also been found that river sediments deposited in the point bars along the banks of the river Ganges are also moderately to highly prone to erosion. The importance of spatial analyst tool of geographic information system has been utilized in delineating the vulnerable areas.

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